MCA: delete all remaining traces of microchannel bus support.

Hardware with MCA bus is limited to 386 and 486 class machines
that are now 20+ years old and typically with less than 32MB
of memory.  A quick search on the internet, and you see that
even the MCA hobbyist/enthusiast community has lost interest
in the early 2000 era and never really even moved ahead from
the 2.4 kernels to the 2.6 series.

This deletes anything remaining related to CONFIG_MCA from core
kernel code and from the x86 architecture.  There is no point in
carrying this any further into the future.

One complication to watch for is inadvertently scooping up
stuff relating to machine check, since there is overlap in
the TLA name space (e.g. arch/x86/boot/mca.c).

Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: James Bottomley <JBottomley@Parallels.com>
Cc: x86@kernel.org
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: H. Peter Anvin <hpa@zytor.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>

1 files changed, 3 insertions, 8 deletions

diff --git a/arch/x86/kernel/mpparse.c b/arch/x86/kernel/mpparse.c
index ca470e4c92dc..b02d4dd6b8a3 100644
--- a/arch/x86/kernel/mpparse.c
+++ b/arch/x86/kernel/mpparse.c
@@ -97,7 +97,7 @@ static void __init MP_bus_info(struct mpc_bus *m)
 
         set_bit(m->busid, mp_bus_not_pci);
         if (strncmp(str, BUSTYPE_ISA, sizeof(BUSTYPE_ISA) - 1) == 0) {
-#if defined(CONFIG_EISA) || defined(CONFIG_MCA)
+#ifdef CONFIG_EISA
                 mp_bus_id_to_type[m->busid] = MP_BUS_ISA;
 #endif
         } else if (strncmp(str, BUSTYPE_PCI, sizeof(BUSTYPE_PCI) - 1) == 0) {
@@ -105,12 +105,10 @@ static void __init MP_bus_info(struct mpc_bus *m)
                         x86_init.mpparse.mpc_oem_pci_bus(m);
 
                 clear_bit(m->busid, mp_bus_not_pci);
-#if defined(CONFIG_EISA) || defined(CONFIG_MCA)
+#ifdef CONFIG_EISA
                 mp_bus_id_to_type[m->busid] = MP_BUS_PCI;
         } else if (strncmp(str, BUSTYPE_EISA, sizeof(BUSTYPE_EISA) - 1) == 0) {
                 mp_bus_id_to_type[m->busid] = MP_BUS_EISA;
-        } else if (strncmp(str, BUSTYPE_MCA, sizeof(BUSTYPE_MCA) - 1) == 0) {
-                mp_bus_id_to_type[m->busid] = MP_BUS_MCA;
 #endif
         } else
                 printk(KERN_WARNING "Unknown bustype %s - ignoring\n", str);
@@ -368,9 +366,6 @@ static void __init construct_ioapic_table(int mpc_default_type)
         case 3:
                 memcpy(bus.bustype, "EISA  ", 6);
                 break;
-        case 4:
-        case 7:
-                memcpy(bus.bustype, "MCA   ", 6);
         }
         MP_bus_info(&bus);
         if (mpc_default_type > 4) {
@@ -623,7 +618,7 @@ void __init default_find_smp_config(void)
                 return;
         /*
          * If it is an SMP machine we should know now, unless the
-         * configuration is in an EISA/MCA bus machine with an
+         * configuration is in an EISA bus machine with an
          * extended bios data area.
          *
          * there is a real-mode segmented pointer pointing to the